64563413 has 2 divisors, whose sum is σ = 64563414. Its totient is φ = 64563412.

The previous prime is 64563391. The next prime is 64563419. The reversal of 64563413 is 31436546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62694724 + 1868689 = 7918^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 64563413 - 2¹⁶ = 64497877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64563413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64563419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32281706 + 32281707.

It is an arithmetic number, because the mean of its divisors is an integer number (32281707).

Almost surely, 2^64563413 is an apocalyptic number.

It is an amenable number.

64563413 is a deficient number, since it is larger than the sum of its proper divisors (1).

64563413 is an equidigital number, since it uses as much as digits as its factorization.

64563413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 64563413 is about 8035.1361531713. The cubic root of 64563413 is about 401.1703494491.

Adding to 64563413 its reverse (31436546), we get a palindrome (95999959).

The spelling of 64563413 in words is "sixty-four million, five hundred sixty-three thousand, four hundred thirteen".